Dresden 2006 – wissenschaftliches Programm
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O: Oberflächenphysik
O 35: Organic films III
O 35.6: Vortrag
Donnerstag, 30. März 2006, 12:30–12:45, WIL B321
In situ study of the Growth of Titanylphthalocyanine (TiOPc) on Au(111) — •T. Dienel1, S.C.B. Mannsfeld2, K. Walzer1, and T. Fritz1 — 1Institut für Angewandte Photophysik, TU Dresden, Germany — 2Department of Chemical Engineering, Stanford University, USA
We present a combined optical and structural investigation of the growth of TiOPc molecules on Au(111). Many different crystallographic polymorphs are known for TiOPc, exhibiting very distinct optical properties. Highly ordered TiOPc films were prepared by means of OMBE with submonolayer to multilayer coverage. The structural analysis was done by Scanning Tunnelling Microscopy (STM) and was confirmed by Low Energy Electron Diffraction (LEED) [1].
The recently implemented Differential Reflectance Spectroscopy (DRS) in combination with Photoluminescence measurements [2] were used to observe the change of the optical properties of the molecular layer in situ, which means during the actual growth of the film. The influence of the substrate temperature on the formation of different crystallographic polymorphs will be discussed as well as the strong quenching of the emission properties of the TiOPc film due to the metal substrate.
[1] S.C.B. Mannsfeld and T. Fritz, Phys. Rev. B 71, 235405 (2005).
[2] H. Proehl et al., Phys. Rev. B 71, 165207 (2005).